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Plywood with high bonding strength

A technology for bonding strength and plywood, applied in the field of plywood, can solve the problems of long service life of plywood, not easy to open, unfavorable for environmental protection, etc., and achieve the effect of reducing viscosity, improving water resistance, and improving bonding strength

Inactive Publication Date: 2019-10-18
吴勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The prior art "2016111716175 A Waterproof Plywood Adhesive and Its Preparation Method" consists of the following formula components in parts by mass: 30-50 parts of UF resin, 1-2 parts of curing agent, 3-5 parts of formaldehyde, alkanolamide 3-5 parts, 3-5 parts of modifier, 10-20 parts of filler, 6-8 parts of coke oil, 10-20 parts of soybean powder, 1-3 parts of enhancer, 6-10 parts of ammonia water, 2- 4 parts, 6-8 parts of polyvinyl alcohol, 2-4 parts of antioxidant, the present invention can have good thermosetting, high viscosity, high strength, good endurance, not easy to deteriorate, good waterproof effect, long service life of plywood, not easy Open, the waterproof plywood adhesive uses soybean powder, polyvinyl alcohol, etc., however, ordinary soybean powder has poor bonding performance, and the components in Comparative Document 1 are mixed together, which cannot play a good waterproof and adhesive effect. Junction performance, at the same time, it adds gas formaldehyde, which is not conducive to environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A plywood with high bonding strength, the plywood comprises at least three layers of wood boards and at least two layers of adhesive, the adhesive layer is modified bean gum, and the modified bean gum is composed of N-isopropyl Acrylamide composite modified graphene is obtained by modifying bean gum with polyethylene glycol.

[0024] Further, the wood ply is a eucalyptus ply or a poplar ply.

[0025] Further, the preparation method of the N-isopropylacrylamide composite modified graphene comprises the following steps:

[0026] (1) Add graphene to the reaction kettle, then add tannic acid aqueous solution 20 times its mass, and shake for 10 minutes to obtain a mixed dispersion;

[0027] (2) Add deionized water, N-isopropylacrylamide, ethylene glycol dimethacrylate, and sodium benzenesulfonate in sequence to the mixed dispersion liquid obtained above, and pass nitrogen into the reaction kettle to discharge the reaction Heat the air in the kettle to 78°C, stir at 1200r / m...

Embodiment 2

[0035] A plywood with high bonding strength, the plywood comprises at least three layers of wood boards and at least two layers of adhesive, the adhesive layer is modified bean gum, and the modified bean gum is composed of N-isopropyl Acrylamide composite modified graphene is obtained by modifying bean gum with polyethylene glycol.

[0036] Further, the wood ply is a eucalyptus ply or a poplar ply.

[0037] Further, the preparation method of the N-isopropylacrylamide composite modified graphene comprises the following steps:

[0038] (1) Add graphene to the reaction kettle, then add tannic acid aqueous solution 20 times its mass, and shake for 10 minutes to obtain a mixed dispersion;

[0039] (2) Add deionized water, N-isopropylacrylamide, ethylene glycol dimethacrylate, and sodium benzenesulfonate in sequence to the mixed dispersion liquid obtained above, and pass nitrogen into the reaction kettle to discharge the reaction Heat the air in the kettle to 78°C, stir at 1200r / m...

Embodiment 3

[0047] A plywood with high bonding strength, the plywood comprises at least three layers of wood boards and at least two layers of adhesive, the adhesive layer is modified bean gum, and the modified bean gum is composed of N-isopropyl Acrylamide composite modified graphene is obtained by modifying bean gum with polyethylene glycol.

[0048]Further, the wood ply is a eucalyptus ply or a poplar ply.

[0049] Further, the preparation method of the N-isopropylacrylamide composite modified graphene comprises the following steps:

[0050] (1) Add graphene to the reaction kettle, then add tannic acid aqueous solution 20 times its mass, and shake for 10 minutes to obtain a mixed dispersion;

[0051] (2) Add deionized water, N-isopropylacrylamide, ethylene glycol dimethacrylate, and sodium benzenesulfonate in sequence to the mixed dispersion liquid obtained above, and pass nitrogen into the reaction kettle to discharge the reaction Heat the air in the kettle to 78°C, stir at 1200r / mi...

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Abstract

Relating to the technical field of environmental protection, the invention discloses a plywood with high bonding strength. The plywood comprises at least three wood board layers and at least two adhesive layers. The adhesive layers are made of modified bean gum, which is obtained by modifying bean gum with N-isopropylacrylamide composite modified graphene and polyethylene glycol. The plywood prepared according to the invention utilizes the adhesive for modification treatment, thus greatly improving the bonding strength.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a plywood with high bonding strength. Background technique [0002] Plywood is a three-layer or multi-layer board-like material that is made of wood sections that are peeled into veneers or sliced ​​into thin wood, and then glued with adhesives. Usually, odd-numbered veneers are used, and adjacent layers of veneers are used. The fiber directions are glued perpendicular to each other. [0003] Plywood is one of the commonly used materials for furniture, and it is one of the three major boards of wood-based panels. It can also be used for aircraft, ships, trains, automobiles, buildings and packaging boxes. A group of veneers are usually assembled and glued together according to the direction of the wood grain of adjacent layers perpendicular to each other. Usually, the surface board and inner layer board are symmetrically arranged on both sides of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/12B32B21/13B32B37/06B32B37/12B27D1/04C09J189/00C09J171/02C09J11/04C09J11/06C09J11/08
CPCB27D1/04B32B7/12B32B21/13B32B37/06B32B37/1284C09J11/04C09J11/06C09J11/08C09J189/00C08L71/02C08K9/04C08K3/042C08K5/07
Inventor 吴勇
Owner 吴勇